China bird flu analysis finds more virus threats lurking

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Employees dispose uninfected dead birds at a treatment plant as part of preventive measures against the H7N9 bird flu in GuangzhouBy Kate Kelland LONDON (Reuters) – A deadly new bird flu virus in China evolved from migratory birds via waterfowl to poultry and into people, and there are other bird flu viruses circulating that could follow the same path, scientists have found. The study – an analysis of the evolutionary history of the H7N9 bird flu that has so far killed 44 people – identified several other H7 flu viruses circulating in birds that the researchers said "may pose threats beyond the current outbreak". …

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